We worked closely with Woolworths to pinpoint the most valuable demographic audience segments, and then only targeted these ‘exact’ customer profiles through a user experience tailored towards different online preferences and behaviours. Prequalifying questions ensured only the exact customer prospects were able to opt-in to receiving and SMS or Email to join the membership program and receive their bonus points. We A/B tested different data sets, creatives and user experiences before scaling up the campaign with confidence we could beat the CPA outcomes. Performance was maximised through continuous measurement of conversion by publisher, channel, media format, data source and audience profiles, so that targeting and media placements could be further optimised. Conversion was optimised further by nurturing incomplete registrations through follow up reminders on SMS and email, as well as social re-targeting, programmatic display and video.